CVE-2021-24903 GRAND FlaGallery <= 6.1.2 - Admin+ Stored Cross-Site Scripting
High-privilege users can inject malicious scripts into gallery settings, bypassing security filters to execute code in other users' browsers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-24903?
CVE-2021-24903 is a medium-severity cross-site scripting vulnerability in Unknown Album and Image Gallery with Lightbox – Flagallery Photo Portfolio, published on 28 Feb 2022. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The GRAND FlaGallery WordPress plugin through 6.1.2 does not sanitise and escape some of its gallery settings, which could allow high privilege users to perform Cross-Site scripting attacks even when the unfiltered_html capability is disallowed.
Weakness: CWE-79
Which versions are affected by CVE-2021-24903?
It affects 1 product.
Products include Codeasily Grand Flagallery.
How do I fix CVE-2021-24903?
No fix has been published for CVE-2021-24903 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-24903 being exploited?
There is no known exploitation of CVE-2021-24903 in the wild and no public exploit code.
Other vulnerabilities in Unknown Album and Image Gallery with Lightbox – Flagallery Photo Portfolio
Sources
Also known as GHSA-p9r5-6jx9-h5wp.